1. New York State Department of Health, Albany, New York, USA
2. New York State Department of Environmental Conservation, Delmar, New York, USA
3. New York State Department of Health, Slingerlands, New York, USACurrent affiliation: University of New Mexico, Albuquerque, New Mexico, USA
4. New York State Department of Health, Slingerlands, New York, USA
5. New York State Department of Health, Albany, New York, USAState University of New York, Albany, New York, USA
6. New York State Department of Health, Slingerlands, New York, USAState University of New York, Albany, New York, USA